Thanks but clearance is very tight so I need to be accurate and 29" is 737mm (roughly the size of most 2.3 - 2.4 tyres) and that won't fit. My current 700 x 35 tyre is 700mm and I reckon I can get away with something around 725mm. I was hoping someone might crack out a tape measure.

29 x 2.0 / 29 x 2.1 tyre diameter

Originally Posted by Hogdog

Thanks but clearance is very tight so I need to be accurate and 29" is 737mm (roughly the size of most 2.3 - 2.4 tyres) and that won't fit. My current 700 x 35 tyre is 700mm and I reckon I can get away with something around 725mm. I was hoping someone might crack out a tape measure.

If it's too big I'll just go with a 29 x 1.75 Smart Sam.

Then you need to specify which tire you want to use, since different manufacturers' tires with the same nominal size are actually different sizes.

Thanks but clearance is very tight so I need to be accurate and 29" is 737mm (roughly the size of most 2.3 - 2.4 tyres) and that won't fit. My current 700 x 35 tyre is 700mm and I reckon I can get away with something around 725mm. I was hoping someone might crack out a tape measure.

If it's too big I'll just go with a 29 x 1.75 Smart Sam.

The BSD is 622mm. plus 100mm. (nominal size of a 2" tire) would give you a diameter of ± 722mm. I'd suggest that a 2" tire will be a little tight. Sorry, I don't have a 2" tire to measure for you, only a 2.25".

The trouble with having an open mind is that people will insist on trying to put things in it.

29 x 2.0 / 29 x 2.1 tyre diameter

Originally Posted by Hogdog

Thanks but clearance is very tight so I need to be accurate and 29" is 737mm (roughly the size of most 2.3 - 2.4 tyres) and that won't fit. My current 700 x 35 tyre is 700mm and I reckon I can get away with something around 725mm. I was hoping someone might crack out a tape measure.

29 x 2.0 / 29 x 2.1 tyre diameter

Originally Posted by Hogdog

I realise that and I don't have a specific tyre in mind. I'd just like to know if anyone, anywhere has ever measured a 29 x 2.0 tyre...Not too much to ask surely?

No.. nobody anywhere has ever measured a 29x2.0 tyre, and even if they had, unless you are using the same tyre, the dimension may or may not be what you find in a 29x2.0 tyre of your choice. Is that really so hard to understand?

The BSD is 622mm. plus 100mm. (nominal size of a 2" tire) would give you a diameter of ± 722mm. I'd suggest that a 2" tire will be a little tight. Sorry, I don't have a 2" tire to measure for you, only a 2.25".

No.. nobody anywhere has ever measured a 29x2.0 tyre, and even if they had, unless you are using the same tyre, the dimension may or may not be what you find in a 29x2.0 tyre of your choice. Is that really so hard to understand?

He's right, tho. There are no real standards for how they measure tires. I've had 2.3 tires that are fatter than other mfg's 2.55 tires.

You'll just have to buy a set with your best guess and hope they fit.

As I said before, I'm aware of that... I just needed a radius and make/model of tyre so that if it looked like it would fit I could go and buy it. It's a hell of alot easier than naming every tyre on the market individually and asking people to measure them until I found something suitable.

It was a joke, but illustrated my point, which is, again, that generic 29x2.0 measurements are going to be of little to no use to you if you're splitting hairs in a tight clearance situation.
Good luck.

It was a joke, but illustrated my point, which is, again, that generic 29x2.0 measurements are going to be of little to no use to you if you're splitting hairs in a tight clearance situation.
Good luck.

Heh... I have a bud who wedged a 27.5 tire in back of his Turner Burner. It fit fine in the shop. We found that once he got out on the trail, the rear tire would pick up small rocks and suck them through his chainstay bridge, making a loud KLACK! as it went through. Once he hit the slightest bit of sticky mud, it was all over. The tire also rubbed against the chainstay as the wheel flexed.